Can you find out the missing number in the grid?

Which tank will fill first?

Solve the equation in the image by looking at the pattern closely.

Can you find the dog hidden in a group of pandas?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

what one word does the below rebus identifies?

How can you take 2 from 5 and leave 4?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?